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This USB-C to DC 4.0x1.7mm power conversion cable supports PD power delivery protocol, offering 9V, 15V and 20V adjustable voltage to match different laptop and device power demands. The precision 4.0x1.7mm DC plug ensures tight and stable connection without loose contact. Adopted premium wire core and shielding layer, it provides steady power transmission and comprehensive safety protection. No driver installation required, easy to plug and play, perfect for home use, office replacement and outdoor emergency power supply for compatible laptops, smartphones and portable electronics.